LensFactor vs Green
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LensFactor
This app helps calculate lens factors, screen sizes, and projector distances based on known variables. It's a utility for professionals or enthusiasts needing precise measurements for display setups.
- Calculate lens factor
- Calculate screen size
- Calculate projector distance
- Input screen size and projector distance
- Input lens factor and projector distance
- Input lens factor and screen size
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LensFactor is an application for the iPhone OS which has 3 basic functions: - Calculate the lens factor when the screen size and projector distance is known - Calculate the screen size when the lens factor(s) and projector distance is known - Calculate the projector distance when the lens factor(s) and screen size is known
Green
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This application can be used to remote control the Green-GO software version 5. When there is a version of Green-GO Control version 5 running on the network, this application will automatically connect to it and show the interface. Everything you can do in the actual software is also accessible through this application.
Screenshots
Verdict
The clearest difference is price: Green at Free against LensFactor's $1.99. LensFactor's advantage is update cadence (every 24 months vs every 49 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Green is free to download; LensFactor costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LensFactor ships an update every 24 months, Green every 49 months. Both last shipped on September 21, 2026.
| Parameter | LensFactor | Green |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 24 months — better | Every 49 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Bart van Stiphout | ELC lighting bv |
In-app purchases
LensFactor
No in-app purchases
Green
No in-app purchases
